Quick printing camera attachment



Jan. 3, 1961 MARSHALL, 5 2,966,882

QUICK PRINTING CAMERA ATTACHMENT Filed Feb.

INVENTOR. M/CW/IEZ 1 444867941452.

7702 A/E Y d States Patent QUICK PRINTING CAMERA ATTACHMENT Michael J. Marshall, Sr., 180 Turpin St., Rochester 21, N.Y.

Filed Feb. 20, 1958, Ser. No. 716,441

4 Claims. (Cl. 118-236) This invention relates to an attachment for use with cameras of the so-called Polaroid or quick printing type which are adapted to simultaneously produce positive and negative images and provide the finished positive picture in about sixty seconds, and it particularly relates to an attachment for use in fixing the positive image after development.

As is now well known, the Polaroid type camera produces a photographic image by first exposing a photosensitive, silver-halide emulsion sheet to the object to be reproduced and then contacting the exposed photo-sensitive with a second sheet in superposition thereto. This second sheet carries on its surface a plurality of pods containing the developer liquid; these pods being ruptured upon the exertion of pressure to spread the developer between the two sheets. The pods are ruptured and the developer is spread evenly by pulling the super-imposed sheets between a set of rollers.

The superimposed and developed sheets are pulled out of the camera, as described above, a suflicient distance to take care of the exposed portions. This part of the superimposed sheets are then torn off and the sheets separated to provide a negative and positive. image; the positive image forming the finished print. However, the surface of the print is still in a soft and plastic condition so that it cannot be handled without damage. In order, therefore, to finish the processing of the print, it has heretofore been necessary to coat the print with a protective plastic layer by rubbing a brush across the surface of the print. This requires a flat, firm surface as a support since the print comes out of the camera in a curled condition due to its having been part of a roll, and because such a flat support is advantageous for best, spreading the coating in a smooth and homogeneous manner.

In order to obtain the desired firm, flat surface, many people use their furniture, walls or even press the print against their own bodies. However, the plastic coating material often runs over onto the furniture or clothes of the person using it and results in expensive damage to the furniture or clothes. Furthermore, it is ditficult to keep the curled print straight while applying the coating.

It is, therefore, one object of the present invention to overcome the above disadvantages by providing an attachment on the camera which easily and accurately applies the protective coating to the print.

Another object of the present invention is to provide an attachment which is simple in construction and easy to use.

Other objects of the present invention are to provide an improved camera attachment, of the character described, that is easily and economically produced, which is sturdy in construction, and which is highly efiicient in operation.

With the above and related objects in view, this inven tion consists in the details of construction and combination of parts, as will be more fully understood from the following description, when read in conjunction with the accompanying drawing in which:

Fig. 1 is a side elevational view of a camera having an attachment thereon embodying the present invention.

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is a sectional view taken on line 3--3 of Fig. 1.

Fig. 4 is a view taken on line 4--4 of Fig. 2.

Fig. 5 is a view taken on line 55 of Fig. 3.

Referring now in greater detail to the drawing wherein similar reference characters refer to similar parts, there is shown a camera 10, of the Polaroid type, the camera being in open position with the bellows 12 extended and with the cover plate 14 underlying the bellows. Depend-. ing from the cover plate 14 is a coating attachment, generally designated 16 which constitutes this invention.

The attachment 16 comprises a base plate 18 connected in any desirable manner to the cover plate 14, as, for example, by welding, soldering, bolting, riveting, etc. It may also be made integral with the cover plate 14 especially where the camera parts are constructed of molded synthetic resin material or are otherwise molded or cast.

The base plate 18 is provided at its rearward portion with bent side edges forming oppositely-arranged side channels or grooves 20 forming a guide means. At the forward portion of the base plate 18, at either side thereof, are provided depending ears 22 having corresponding holes situated adjacent their forward ends to serve as journals for the transverse shaft 24 supporting a roller 26. A second shaft 28 extends between the ears 22, approximately at the center thereof. This shaft 28 is rotatably journaled in one of the ears 22 and extends through the other ear 22 outside of which it is bent to form a lever arm 30 provided with a bent handle portion 32.

Mounted on the shaft 28, between the ears 22, is an elongated, transversely-extending, recessed holder 34. Positioned within the recess of holder 34 is an elongated brush 36. The holder 34 is provided with sufficient coating material within the recess to afford a constant supply of coating fluid to the brush 36 seated within the recesses, and the supply in the recess may be replenished from time to time, from the supply normally furnished with each roll of film.

In operation, the print 3 8 which has been severed from the strip 40, is led under the base plate 14 by inserting the edges of the print within the channels 20. The print is then pulled across the brush 36 (positioned in its upright position as shown in full line in Fig. 4) and around the roller 26. The forward end of the print is then pulled through during which time, the coating is applied from the brush 36 and the roller 26 serves to remove the curl from the print.

When it is desired to move the brush 36 into its inoperative position, the handle 32 is grasped and the lever arm 30 is rotated in the direction indicated by the arrow in Figs. 1 and 5. This moves the brush 36 into the position shown in dotted outline in Figs. 4 and 5. In this position, the print can be threaded through the attachment without receiving a coating.

Although this invention has been described in considerable detail, such description is intended as being illustrative rather than limiting, since the invention may be variously embodied, and the scope of the invention is to be determined as claimed.

Having thus set forth and disclosed the nature of this invention, what is claimed is:

1. An attachment for quick printing cameras comprising a pair of ears, a first rotatable shaft extending transversely between said ears, a print straightening roller mounted on said first shaft, a second rotatable shaft spaced from said first shaft and extending transversely between said ears, an elongated holder mounted on said second shaft, a recess in said holder, a brush anchored in said recess and extending outwardly therefrom, and manually operable lever means connected to said second shaft for rotating said brush between inoperative position permitting a print to be inserted beneath said brush and print brushing position when the print is inserted therebeneath.

2. The attachment of claim 1 wherein a channeled print guide means is positioned adjacent said second shaft.

3. An attachment for mounting on a quick printing camera adapted to simultaneously develop a positive and negative image, said attachment including means for applying a protective coating on a print formed from the positive image, and including a print straightening roller, a brush adjacent said roller, a shaft on which said brush is mounted, guide means to guide a print over said brush and around said roller, and means for selectively rotating said brush on said second shaft into and out of coating position.

4. A picture print curl straightening and coating attachment for a quick printing camera, said attachment comprising a base for attaching the attachment to the camera, said base having an upstanding ear at opposite ends thereof, a pair of shafts journaled in parallel relation between said ears, a print straightening roller mounted on one of said shafts, an elongated channeled ho der mounted on said second shaft, a coating brush anchored in said channeled holder, a manually operable lever means extending from said holder and shaft for rotating said holder between print coating position adjacent said base and a position away from said base permitting the print to be inserted therebetween, whereby when the print is inserted in operative position, the brush is rotated to coating position, and the print may then be pulled from beneath the coating brush and over the straightening roller to coat and straighten the print in one operation.

References Cited in the file of this patent UNITED STATES PATENTS 511,281 Stevens Dec. 19, 1893 885,385 Senne Apr. 21, 1908 888,193 Rider May 19, 1908 896,115 Jaeger Aug. 18, 1908 2,095,894 Tarr Oct. 12, 1937' 2,349,564 Ryan et al May 23, 1944 FOREIGN PATENTS 691,744 Krueger May 20, 1953 

